Looking for a carb recommendation

Hello,

I have a 68 Dart, 340 .060 over 9.98:1 static compression, 422 ci. I am running W-2 heads which have been previously ported square (no flow numbers), with a matched LD340 intake, also max ported and modified to work with the W2's. The heads and intake came out of Reno, NV, where I was told Walker Evans had ran the set up on one of the desert race trucks. I believe I could use a different carb to help maximize my performance. I am currently running a Holley 750 vac secondary with a proform main body. 22 degrees initial advance, 36 total. MSD Billet distributer. Camshaft is a Hughes engines grind:

Camshaft Technical Details

Intake Valve Lift 1.6
Exhaust Valve Lift 1.6 .569"
.579"

Intake Duration at .050"
Exhaust Duration at .050" 237°
242°

Lobe Separation Angle 107º
Intake Centerline 104º
Intake Opening at .050"
Exhaust Opening at .050" 14.5° BTC
51° BBC

Intake Closing at .050"
Exhaust Closing at .050" 42.5° ABC
11° ATC

Min. Suggested Cylinder PSI 160

RPM 1800-6200

I am running 1.6 rockers.

What carb would you suggest? 90% street use, summer only, with a weekend or two at the strip. I am at 6000 feet elevation, which I know doesn't help.

Thanks in advance!